/* ===================================================================
   MESL 机场 - Industrial 5-Axis CNC & Titanium Precision UI
   品牌域名: https://meslcloud.shop
   设计哲学: 五轴数控切削、高密度钛合金、哑光枪铁灰(#1A1C20)、铣削银槽(#C7CAD1)、热切削电紫(#7000FF)
   零矢量图标 - 纯机械倒角、游标卡尺读数、机加工滑轨装配板与千分尺刻度
   =================================================================== */

/* -------------------------------------------------------------------
   1. 工业数控变量系统 (Daytime 航空铝机加 / Night 枪铁灰热切削)
   ------------------------------------------------------------------- */
:root {
  /* 基础数控核心调色板 */
  --cnc-gunmetal: #1A1C20;
  --cnc-gunmetal-dark: #121417;
  --cnc-gunmetal-deep: #0D0E11;
  --cnc-silver: #C7CAD1;
  --cnc-silver-bright: #E2E4E9;
  --cnc-silver-dim: #8E929D;
  --cnc-violet: #7000FF;
  --cnc-violet-hot: #953BFF;
  --cnc-violet-glow: rgba(112, 0, 255, 0.45);
  --cnc-violet-subtle: rgba(112, 0, 255, 0.12);

  /* 默认：白天模式 (精密航空铝板 / 磨砂铣削质感) */
  --bg-chamber: #EAECEF;
  --bg-plate: #F6F7F9;
  --bg-plate-elevated: #FFFFFF;
  --bg-plate-subtle: #DEE1E6;
  --bg-groove: #D5D8DF;

  --text-main: #1A1C20;
  --text-sub: #454952;
  --text-dim: #717784;
  --text-mono-glow: #1A1C20;

  --border-plate: #C7CAD1;
  --border-sharp: #A9ADB7;
  --border-cut: #7000FF;

  --plate-shadow: 0 4px 16px rgba(26, 28, 32, 0.08), inset 0 1px 0 rgba(255, 255, 255, 0.8);
  --plate-depth-shadow: 0 14px 32px rgba(26, 28, 32, 0.12), inset 0 1px 0 rgba(255, 255, 255, 0.9);
  --laser-line: rgba(112, 0, 255, 0.3);

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", "Roboto Mono", Consolas, Menlo, monospace;

  /* 机械倒角参数 (Zero Tolerance Mechanical Chamfers) */
  --chamfer-sm: polygon(0 0, calc(100% - 6px) 0, 100% 6px, 100% 100%, 6px 100%, 0 calc(100% - 6px));
  --chamfer-md: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
  --chamfer-lg: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 20px 100%, 0 calc(100% - 20px));
  --chamfer-badge: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
}

/* 夜间模式：重型深色淬火钛金属与热切削等离子紫 */
[data-theme="dark"] {
  --bg-chamber: #0E1013;
  --bg-plate: #15181C;
  --bg-plate-elevated: #1B1E23;
  --bg-plate-subtle: #21252C;
  --bg-groove: #090A0C;

  --text-main: #F2F4F7;
  --text-sub: #A2A7B2;
  --text-dim: #686E7B;
  --text-mono-glow: #E2E4E9;

  --border-plate: #292D35;
  --border-sharp: #3E4450;
  --border-cut: #8D32FF;

  --plate-shadow: 0 4px 20px rgba(0, 0, 0, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.05);
  --plate-depth-shadow: 0 16px 36px rgba(0, 0, 0, 0.8), inset 0 1px 0 rgba(255, 255, 255, 0.08);
  --laser-line: rgba(112, 0, 255, 0.65);
}

/* -------------------------------------------------------------------
   2. 工业基础规范与精密网格背景
   ------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-chamber);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color 0.3s cubic-bezier(0.2, 0, 0, 1), color 0.3s cubic-bezier(0.2, 0, 0, 1);
  /* 机械坐标网格背景 (CNC Mill Grid Line) */
  background-image: 
    linear-gradient(var(--bg-groove) 1px, transparent 1px),
    linear-gradient(90deg, var(--bg-groove) 1px, transparent 1px);
  background-size: 40px 40px;
  background-position: -1px -1px;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

ul, ol {
  list-style: none;
}

.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
  position: relative;
}

/* 结构螺栓铆钉装饰微标 */
.rivet {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cnc-silver-dim);
  box-shadow: inset 0 1px 1px #000, 0 1px 0 rgba(255, 255, 255, 0.5);
  margin: 0 4px;
  vertical-align: middle;
}

/* -------------------------------------------------------------------
   3. 页眉导航机台 (CNC Machined Gantry Header)
   ------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg-plate);
  border-bottom: 2px solid var(--border-plate);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
  /* 顶部细微刻度卡尺线 */
  background-image: repeating-linear-gradient(90deg, var(--border-plate) 0, var(--border-plate) 1px, transparent 1px, transparent 20px);
  background-size: 100% 3px;
  background-repeat: no-repeat;
  background-position: top;
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
}

/* 工业级品牌标志 (CNC 倒角金属徽章) */
.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.brand-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 38px;
  background: var(--cnc-gunmetal);
  color: #FFFFFF;
  clip-path: var(--chamfer-sm);
  border: 1px solid var(--cnc-silver);
  position: relative;
  font-size: 1.05rem;
  font-weight: 900;
}

.brand-badge::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 4px;
  height: 100%;
  background: var(--cnc-violet);
}

.brand-text-wrap {
  display: flex;
  flex-direction: column;
}

.brand-text-main {
  font-size: 1.25rem;
  font-weight: 900;
  color: var(--text-main);
  line-height: 1.1;
  letter-spacing: 0.02em;
}

.brand-text-sub {
  font-size: 0.7rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* 导航目录 (包含首页 + 各板块 + 推荐资讯) */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-plate-subtle);
  padding: 4px;
  clip-path: var(--chamfer-sm);
  border: 1px solid var(--border-plate);
}

.nav-link {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-sub);
  padding: 7px 14px;
  transition: all 0.2s ease;
  position: relative;
  letter-spacing: 0.01em;
}

.nav-link:hover {
  color: var(--text-main);
  background: var(--bg-plate-elevated);
}

/* 推荐资讯高亮机加微标 */
.nav-link.nav-link-radar {
  color: var(--cnc-violet);
  background: var(--cnc-violet-subtle);
  border: 1px solid rgba(112, 0, 255, 0.3);
  font-family: var(--font-mono);
}

.nav-link.nav-link-radar:hover {
  background: var(--cnc-violet);
  color: #FFFFFF;
}

/* 导航右侧动作机组 (微调旋钮式昼夜切换 + CTA) */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* 精致专业化昼夜模式切换按钮 (Precision Optical Day/Night Dial) */
.theme-dial-btn {
  width: 42px;
  height: 42px;
  background: var(--bg-plate-elevated);
  border: 1.5px solid var(--border-plate);
  clip-path: var(--chamfer-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05), inset 0 1px 0 rgba(255, 255, 255, 0.8);
  transition: border-color 0.25s ease, box-shadow 0.25s ease, background-color 0.25s ease, transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  overflow: hidden;
}

.theme-dial-btn:hover {
  border-color: var(--cnc-violet);
  box-shadow: 0 0 14px var(--cnc-violet-glow);
  transform: translateY(-2px);
}

.theme-dial-btn:active {
  transform: translateY(0);
}

.theme-icon-sun,
.theme-icon-moon {
  width: 20px;
  height: 20px;
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.25s ease, color 0.25s ease;
}

/* 日间模式 (默认白天：精致金色光辉太阳) */
.theme-icon-sun {
  display: block;
  color: #F59E0B;
  opacity: 1;
  transform: scale(1) rotate(0deg);
}

.theme-dial-btn:hover .theme-icon-sun {
  transform: scale(1.12) rotate(45deg);
  color: #D97706;
}

.theme-icon-moon {
  display: none;
  opacity: 0;
  transform: scale(0.5) rotate(-90deg);
}

/* 夜间深色模式 (极夜青蓝/电光紫质感月影) */
[data-theme="dark"] .theme-dial-btn {
  background: var(--bg-plate-elevated);
  border-color: var(--border-plate);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

[data-theme="dark"] .theme-dial-btn:hover {
  border-color: var(--cnc-violet-hot);
  box-shadow: 0 0 16px var(--cnc-violet-glow);
}

[data-theme="dark"] .theme-icon-sun {
  display: none;
  opacity: 0;
  transform: scale(0.5) rotate(90deg);
}

[data-theme="dark"] .theme-icon-moon {
  display: block;
  color: #00FFCC;
  opacity: 1;
  transform: scale(1) rotate(0deg);
  filter: drop-shadow(0 0 6px rgba(0, 255, 204, 0.45));
}

[data-theme="dark"] .theme-dial-btn:hover .theme-icon-moon {
  transform: scale(1.12) rotate(-15deg);
  color: #5EEAD4;
}

/* 工业 CTA 呼吁按钮规范 (带倒角机械切面与热切紫光) */
.btn-cnc-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  background: var(--cnc-violet);
  color: #FFFFFF;
  clip-path: var(--chamfer-sm);
  border: 1px solid var(--cnc-violet-hot);
  box-shadow: 0 4px 18px var(--cnc-violet-glow), inset 0 1px 0 rgba(255, 255, 255, 0.3);
  position: relative;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  white-space: nowrap;
}

.btn-cnc-primary:hover {
  background: var(--cnc-violet-hot);
  box-shadow: 0 6px 24px var(--cnc-violet-glow);
  transform: translateY(-2px);
  color: #FFFFFF;
}

.btn-cnc-primary::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: rgba(255, 255, 255, 0.6);
}

.btn-cnc-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  font-weight: 700;
  background: var(--bg-plate-elevated);
  color: var(--text-main);
  clip-path: var(--chamfer-sm);
  border: 1px solid var(--border-plate);
  box-shadow: var(--plate-shadow);
  transition: all 0.2s ease;
  white-space: nowrap;
}

.btn-cnc-secondary:hover {
  border-color: var(--cnc-violet);
  color: var(--cnc-violet);
  transform: translateY(-2px);
}

.btn-block {
  width: 100%;
}

/* -------------------------------------------------------------------
   4. 主视觉区 (Hero: 5-Axis CNC Titanium Block & Toolpath Assembly)
   ------------------------------------------------------------------- */
.hero-assembly {
  padding: 70px 0 60px 0;
  position: relative;
  overflow: hidden;
}

.hero-layout-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 48px;
  align-items: center;
}

/* 状态标定与坐标刻度 */
.hero-axis-stamp {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 5px 14px;
  background: var(--bg-plate-subtle);
  border: 1px solid var(--border-plate);
  clip-path: var(--chamfer-sm);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-bottom: 24px;
  letter-spacing: 0.05em;
}

.hero-axis-led {
  width: 8px;
  height: 8px;
  background: #00FF66;
  box-shadow: 0 0 8px #00FF66;
  border-radius: 50%;
}

/* 大标题必须包含‘当前品牌名’ MESL 机场 */
.hero-title {
  font-size: 3.2rem;
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.03em;
  color: var(--text-main);
  margin-bottom: 22px;
}

.hero-title-gradient {
  background: linear-gradient(135deg, var(--text-main) 0%, var(--cnc-violet) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* 简介内容说明 */
.hero-brief {
  font-size: 1.12rem;
  color: var(--text-sub);
  line-height: 1.7;
  margin-bottom: 36px;
  max-width: 580px;
}

.hero-brief strong {
  color: var(--text-main);
  font-weight: 700;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

/* 浮动钛合金切削工件 (Interactive Center Titanium Block) */
.titanium-workpiece-container {
  position: relative;
  perspective: 1000px;
}

.titanium-block {
  width: 100%;
  height: 380px;
  background: linear-gradient(145deg, #242830 0%, #17191D 60%, #0F1013 100%);
  border: 2px solid var(--border-sharp);
  clip-path: var(--chamfer-lg);
  box-shadow: 
    0 24px 50px rgba(0, 0, 0, 0.45),
    inset 0 2px 4px rgba(255, 255, 255, 0.15),
    inset 0 -2px 6px rgba(0, 0, 0, 0.7);
  position: relative;
  overflow: hidden;
  cursor: crosshair;
  user-select: none;
}

/* 钛合金拉丝纹理与微距刻度 */
.titanium-block::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.02) 0px, rgba(255, 255, 255, 0.02) 1px, transparent 1px, transparent 2px),
    repeating-linear-gradient(90deg, rgba(199, 202, 209, 0.05) 0px, rgba(199, 202, 209, 0.05) 1px, transparent 1px, transparent 40px);
  pointer-events: none;
}

/* 几何激光切削标线与 Monolithic "MESL" 字样 */
.titanium-wordmark-milled {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-mono);
  font-size: 4.8rem;
  font-weight: 900;
  letter-spacing: 0.18em;
  color: transparent;
  -webkit-text-stroke: 2px var(--cnc-silver-bright);
  text-shadow: 0 0 24px var(--cnc-violet-glow);
  pointer-events: none;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.titanium-sub-cut {
  font-size: 0.8rem;
  letter-spacing: 0.45em;
  color: var(--cnc-silver);
  -webkit-text-stroke: 0px;
  margin-top: -6px;
  opacity: 0.75;
}

/* 动态切削轨迹画布 */
#toolpath-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: auto;
}

/* 工件周边坐标尺与千分尺读数 */
.workpiece-overlay-meta {
  position: absolute;
  bottom: 14px;
  left: 20px;
  right: 20px;
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--cnc-silver-dim);
  pointer-events: none;
}

.workpiece-overlay-meta span {
  background: rgba(0, 0, 0, 0.4);
  padding: 3px 8px;
  border-left: 2px solid var(--cnc-violet);
}

/* -------------------------------------------------------------------
   5. 游标卡尺毫秒级精确探测器 (Precision Vernier Caliper Hover)
   ------------------------------------------------------------------- */
.vernier-caliper-target {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  background: var(--bg-plate-subtle);
  border: 1px solid var(--border-plate);
  clip-path: var(--chamfer-sm);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--text-main);
  position: relative;
  cursor: pointer;
  transition: all 0.2s ease;
}

.vernier-caliper-target:hover {
  border-color: var(--cnc-violet);
  background: var(--bg-plate-elevated);
}

/* 游标卡尺悬浮卡尺板 (Vernier Scale) */
.caliper-vernier-hud {
  position: absolute;
  bottom: 125%;
  left: 50%;
  transform: translateX(-50%) translateY(6px);
  background: var(--cnc-gunmetal);
  color: #FFFFFF;
  border: 1px solid var(--cnc-silver);
  clip-path: var(--chamfer-sm);
  padding: 10px 14px;
  width: 230px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 100;
}

.vernier-caliper-target:hover .caliper-vernier-hud {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.caliper-hud-title {
  font-size: 0.72rem;
  color: var(--cnc-silver);
  display: flex;
  justify-content: space-between;
  margin-bottom: 4px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
  padding-bottom: 3px;
}

.caliper-reading-large {
  font-size: 1.15rem;
  font-weight: 900;
  color: #00FFCC;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}

/* 卡尺微米刻度刻痕 */
.caliper-scale-ticks {
  height: 12px;
  background: repeating-linear-gradient(90deg, #FFFFFF 0px, #FFFFFF 1px, transparent 1px, transparent 8px);
  border-bottom: 1px solid var(--cnc-violet);
  position: relative;
}

.caliper-scale-slider {
  position: absolute;
  top: 0;
  left: 45%;
  width: 2px;
  height: 100%;
  background: var(--cnc-violet-hot);
  box-shadow: 0 0 6px var(--cnc-violet-hot);
}

/* 核心指标参数排阵 */
.hero-bench-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 50px;
  background: var(--bg-plate);
  border: 2px solid var(--border-plate);
  clip-path: var(--chamfer-md);
  padding: 24px;
  box-shadow: var(--plate-shadow);
}

.bench-cell {
  border-right: 1px solid var(--border-plate);
  padding: 0 12px;
}

.bench-cell:last-child {
  border-right: none;
}

.bench-label {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-dim);
  text-transform: uppercase;
  margin-bottom: 6px;
  letter-spacing: 0.04em;
}

.bench-value {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--text-main);
  letter-spacing: -0.02em;
}

/* -------------------------------------------------------------------
   6. 结构化板块标题 (Mechanical Sub-Assembly Headers)
   ------------------------------------------------------------------- */
.section-machined-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 60px auto;
}

.header-coordinate-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--cnc-violet);
  background: var(--cnc-violet-subtle);
  border: 1px solid rgba(112, 0, 255, 0.25);
  clip-path: var(--chamfer-sm);
  padding: 4px 12px;
  margin-bottom: 12px;
  letter-spacing: 0.08em;
}

.header-title-cut {
  font-size: 2.3rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--text-main);
  margin-bottom: 14px;
}

.header-sub-desc {
  font-size: 1.05rem;
  color: var(--text-sub);
}

/* -------------------------------------------------------------------
   7. 核心优势板块 (3个重工滑轨图文卡片 - 无矢量图标，纯机械倒角)
   ------------------------------------------------------------------- */
.features-grid-machined {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

/* 互锁滑动板 (Interlocking Sliding Plates) 模拟机台导轨 */
.slide-plate-card {
  background: var(--bg-plate);
  border: 2px solid var(--border-plate);
  clip-path: var(--chamfer-md);
  padding: 36px 30px;
  box-shadow: var(--plate-shadow);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.28s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.28s ease;
  /* 机械机床侧边刻度条 */
  border-left: 6px solid var(--border-sharp);
}

.slide-plate-card:hover {
  transform: translateY(-8px);
  border-left-color: var(--cnc-violet);
  border-color: var(--border-cut);
  box-shadow: var(--plate-depth-shadow);
}

/* 机械编号与微米刻度指示顶栏 */
.card-gauge-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-plate);
  padding-bottom: 14px;
  margin-bottom: 22px;
}

.card-axis-num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--cnc-violet);
  letter-spacing: 0.05em;
}

.card-gauge-dots {
  display: flex;
  gap: 4px;
}

.card-gauge-dots span {
  width: 6px;
  height: 6px;
  background: var(--cnc-silver-dim);
  display: inline-block;
  clip-path: var(--chamfer-sm);
}

.card-title-machined {
  font-size: 1.38rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 14px;
  letter-spacing: -0.01em;
}

.card-desc-machined {
  font-size: 0.95rem;
  color: var(--text-sub);
  line-height: 1.7;
  margin-bottom: 24px;
  flex-grow: 1;
}

/* 机械参数规格指标清单 */
.card-spec-strip {
  background: var(--bg-plate-subtle);
  border: 1px solid var(--border-plate);
  clip-path: var(--chamfer-sm);
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.spec-line {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-dim);
  display: flex;
  justify-content: space-between;
}

.spec-line strong {
  color: var(--text-main);
}

/* -------------------------------------------------------------------
   8. 流媒体与 AI 支持图卡 (全机械流图卡)
   ------------------------------------------------------------------- */
.unlock-grid-machined {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.unlock-heavy-plate {
  background: var(--bg-plate);
  border: 2px solid var(--border-plate);
  clip-path: var(--chamfer-lg);
  padding: 40px 36px;
  box-shadow: var(--plate-shadow);
  position: relative;
  transition: all 0.28s cubic-bezier(0.16, 1, 0.3, 1);
}

.unlock-heavy-plate:hover {
  transform: translateY(-6px);
  border-color: var(--border-cut);
  box-shadow: var(--plate-depth-shadow);
}

.unlock-plate-title-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.unlock-chamfer-badge {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 800;
  padding: 4px 12px;
  background: var(--cnc-gunmetal);
  color: #FFFFFF;
  clip-path: var(--chamfer-sm);
  letter-spacing: 0.05em;
}

.unlock-heavy-plate h3 {
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--text-main);
  margin-bottom: 12px;
}

.unlock-heavy-plate p {
  font-size: 0.98rem;
  color: var(--text-sub);
  line-height: 1.7;
  margin-bottom: 26px;
}

/* 机械参数网格矩阵 (无矢量图标，全用机械矩形与状态指标) */
.media-platform-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-bottom: 28px;
}

.media-tag-cell {
  background: var(--bg-plate-subtle);
  border: 1px solid var(--border-plate);
  clip-path: var(--chamfer-sm);
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.status-index-pin {
  width: 6px;
  height: 6px;
  background: #00FF66;
  box-shadow: 0 0 6px #00FF66;
}

.unlock-plate-footer {
  border-top: 1px solid var(--border-plate);
  padding-top: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* -------------------------------------------------------------------
   9. 套餐价格对比表 (参考网上真实 MESL 价格)
   ------------------------------------------------------------------- */
.pricing-grid-machined {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.pricing-plate-card {
  background: var(--bg-plate);
  border: 2px solid var(--border-plate);
  clip-path: var(--chamfer-md);
  padding: 40px 32px;
  box-shadow: var(--plate-shadow);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.28s cubic-bezier(0.16, 1, 0.3, 1);
}

.pricing-plate-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--plate-depth-shadow);
}

/* 热门推荐重工高亮版 (Standard Pro - 真实热卖款) */
.pricing-plate-card.featured {
  border: 2px solid var(--cnc-violet);
  background: var(--bg-plate-elevated);
  box-shadow: 0 8px 30px var(--cnc-violet-glow);
  transform: scale(1.02);
  z-index: 2;
}

.pricing-plate-card.featured:hover {
  transform: scale(1.02) translateY(-8px);
}

.pricing-ribbon-milled {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  background: var(--cnc-violet);
  color: #FFFFFF;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  padding: 4px 16px;
  clip-path: polygon(0 0, 100% 0, calc(100% - 6px) 100%, 6px 100%);
}

.pricing-head-group {
  text-align: center;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border-plate);
  padding-bottom: 20px;
}

.plan-title-mono {
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--text-main);
  margin-bottom: 6px;
}

.plan-desc-dim {
  font-size: 0.85rem;
  color: var(--text-dim);
}

.price-monolithic-wrap {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
  margin: 18px 0 6px 0;
  font-family: var(--font-mono);
}

.price-currency-sign {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-main);
}

.price-digit-giant {
  font-size: 3.4rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  color: var(--text-main);
  line-height: 1;
}

.price-cycle-text {
  font-size: 0.92rem;
  color: var(--text-dim);
}

/* 特性参数条目 */
.pricing-matrix-list {
  margin: 24px 0 32px 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex-grow: 1;
}

.pricing-matrix-list li {
  font-size: 0.92rem;
  color: var(--text-sub);
  display: flex;
  align-items: flex-start;
  gap: 10px;
  line-height: 1.5;
}

.spec-bullet {
  width: 6px;
  height: 6px;
  background: var(--cnc-violet);
  margin-top: 8px;
  flex-shrink: 0;
  clip-path: var(--chamfer-sm);
}

.pricing-matrix-list li.disabled {
  color: var(--text-dim);
  opacity: 0.55;
}

.pricing-matrix-list li.disabled .spec-bullet {
  background: var(--cnc-silver-dim);
}

/* -------------------------------------------------------------------
   10. 用户真实评价 (精密工件标定卡片)
   ------------------------------------------------------------------- */
.reviews-grid-machined {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.review-heavy-card {
  background: var(--bg-plate);
  border: 2px solid var(--border-plate);
  clip-path: var(--chamfer-md);
  padding: 32px 28px;
  box-shadow: var(--plate-shadow);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.28s ease;
}

.review-heavy-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-cut);
  box-shadow: var(--plate-depth-shadow);
}

.review-meter-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--cnc-silver-dim);
}

.review-dial-score {
  color: #00FFCC;
  font-weight: 800;
  background: var(--cnc-gunmetal);
  padding: 2px 8px;
  clip-path: var(--chamfer-sm);
}

.review-body-text {
  font-size: 0.96rem;
  color: var(--text-sub);
  line-height: 1.7;
  margin-bottom: 24px;
}

.review-user-foot {
  border-top: 1px solid var(--border-plate);
  padding-top: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.user-monogram {
  width: 40px;
  height: 40px;
  background: var(--cnc-gunmetal);
  color: #FFFFFF;
  clip-path: var(--chamfer-sm);
  font-family: var(--font-mono);
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  border-left: 3px solid var(--cnc-violet);
}

.user-title-mono {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--text-main);
}

.user-role-dim {
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* -------------------------------------------------------------------
   11. 常见问题解答 (FAQ 机械咬合折叠面板)
   ------------------------------------------------------------------- */
.faq-machined-wrapper {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-machined-item {
  background: var(--bg-plate);
  border: 2px solid var(--border-plate);
  clip-path: var(--chamfer-md);
  box-shadow: var(--plate-shadow);
  overflow: hidden;
  transition: border-color 0.2s ease;
}

.faq-machined-item:hover {
  border-color: var(--border-sharp);
}

details[open].faq-machined-item {
  border-color: var(--cnc-violet);
}

.faq-machined-summary {
  padding: 22px 28px;
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
  list-style: none;
}

.faq-machined-summary::-webkit-details-marker {
  display: none;
}

.faq-caliper-ind {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 900;
  color: var(--cnc-violet);
  transition: transform 0.25s ease;
}

details[open] .faq-caliper-ind {
  transform: rotate(90deg);
}

.faq-machined-body {
  padding: 0 28px 24px 28px;
  font-size: 0.96rem;
  color: var(--text-sub);
  line-height: 1.8;
  border-top: 1px solid var(--border-plate);
  padding-top: 16px;
}

/* -------------------------------------------------------------------
   12. 页脚规范 (严格只保留四个标题，在新页面打开)
   ------------------------------------------------------------------- */
.site-footer {
  background: var(--bg-plate);
  border-top: 2px solid var(--border-plate);
  padding: 56px 0 40px 0;
  margin-top: 80px;
  background-image: repeating-linear-gradient(90deg, var(--border-plate) 0, var(--border-plate) 1px, transparent 1px, transparent 40px);
  background-size: 100% 2px;
  background-repeat: no-repeat;
  background-position: top;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 26px;
}

/* 严格限定四个链接标题 */
.footer-links-strict {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
}

.footer-link-item {
  font-family: var(--font-mono);
  font-size: 0.96rem;
  font-weight: 700;
  color: var(--text-sub);
  position: relative;
  transition: all 0.2s ease;
}

.footer-link-item:hover {
  color: var(--cnc-violet);
}

.footer-copyright-note {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-dim);
  text-align: center;
}

.footer-copyright-note a {
  color: var(--text-sub);
}

.footer-copyright-note a:hover {
  color: var(--cnc-violet);
}

/* -------------------------------------------------------------------
   13. 独立子页面通用工件排版 (关于/服务/隐私/地图/推荐资讯)
   ------------------------------------------------------------------- */
.subpage-container {
  max-width: 900px;
  margin: 0 auto;
  padding: 48px 24px 80px 24px;
}

.article-content {
  background: var(--bg-plate);
  border: 2px solid var(--border-plate);
  clip-path: var(--chamfer-lg);
  padding: 48px 44px;
  box-shadow: var(--plate-depth-shadow);
}

.article-content h1 {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--text-main);
  margin-bottom: 20px;
}

.article-content h2 {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-main);
  margin: 36px 0 16px 0;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-plate);
}

.article-content p {
  font-size: 1rem;
  color: var(--text-sub);
  line-height: 1.8;
  margin-bottom: 18px;
}

.article-content ul {
  margin: 16px 0 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  list-style: square;
}

.article-content ul li {
  font-size: 0.98rem;
  color: var(--text-sub);
  line-height: 1.7;
}

.back-home-bar {
  margin-bottom: 28px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 800;
  color: var(--cnc-violet);
}

.back-link:hover {
  text-decoration: underline;
}

/* 推荐资讯独有资讯卡片网格 */
.insights-feed-grid {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-top: 30px;
}

.insight-entry-card {
  background: var(--bg-plate-subtle);
  border: 1px solid var(--border-plate);
  clip-path: var(--chamfer-md);
  padding: 28px;
  transition: all 0.2s ease;
}

.insight-entry-card:hover {
  border-color: var(--cnc-violet);
  transform: translateX(6px);
}

.insight-stamp {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--cnc-violet);
  margin-bottom: 8px;
  text-transform: uppercase;
}

.insight-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 10px;
}

.insight-summary {
  font-size: 0.94rem;
  color: var(--text-sub);
  line-height: 1.7;
}

/* 网站地图网格 */
.sitemap-grid-machined {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 24px;
}

.sitemap-card-machined {
  padding: 24px;
  clip-path: var(--chamfer-sm);
  background: var(--bg-plate-subtle);
  border: 1px solid var(--border-plate);
}

.sitemap-card-machined h3 {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 14px;
  font-family: var(--font-mono);
}

.sitemap-card-machined ul {
  margin-left: 18px;
  list-style: square;
}

.sitemap-card-machined ul li a {
  color: var(--text-sub);
}

.sitemap-card-machined ul li a:hover {
  color: var(--cnc-violet);
}

/* -------------------------------------------------------------------
   14. 响应式媒体查询 (@media 移动端完美单栏)
   ------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .hero-layout-grid {
    grid-template-columns: 1fr;
  }
  .features-grid-machined,
  .pricing-grid-machined,
  .reviews-grid-machined {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-plate-card.featured {
    transform: none;
  }
  .pricing-plate-card.featured:hover {
    transform: translateY(-8px);
  }
}

@media (max-width: 768px) {
  .section {
    padding: 64px 0;
  }

  .nav-menu {
    display: none; /* 移动端隐藏横向菜单，保留右上角工业旋钮与核心CTA */
  }

  .hero-title {
    font-size: 2.1rem;
    line-height: 1.22;
  }

  .hero-brief {
    font-size: 1.02rem;
  }

  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }

  .hero-cta-group .btn-cnc-primary,
  .hero-cta-group .btn-cnc-secondary {
    width: 100%;
    min-height: 48px;
  }

  .hero-bench-row {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    padding: 16px;
  }

  .bench-cell:nth-child(2) {
    border-right: none;
  }

  .features-grid-machined,
  .unlock-grid-machined,
  .pricing-grid-machined,
  .reviews-grid-machined,
  .sitemap-grid-machined {
    grid-template-columns: 1fr;
  }

  .titanium-block {
    height: 280px;
  }

  .titanium-wordmark-milled {
    font-size: 3.4rem;
  }

  .article-content {
    padding: 30px 20px;
  }

  .footer-links-strict {
    gap: 20px;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.85rem;
  }

  .btn-cnc-primary, .btn-cnc-secondary {
    width: 100%;
    min-height: 48px;
  }
}

/* -------------------------------------------------------------------
   15. 深度科普 SEO 文章专属工件样式 (TOC / FAQ / 相关阅读 / 数据对比)
   ------------------------------------------------------------------- */
.article-meta-header {
  border-bottom: 2px solid var(--border-plate);
  padding-bottom: 20px;
  margin-bottom: 30px;
}

.article-tags-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.article-tag-pill {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--cnc-violet);
  background: var(--cnc-violet-subtle);
  border: 1px solid rgba(112, 0, 255, 0.25);
  clip-path: var(--chamfer-sm);
  padding: 3px 10px;
}

.article-meta-info {
  display: flex;
  align-items: center;
  gap: 18px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-dim);
  flex-wrap: wrap;
}

/* 文章目录 (Table of Contents - TOC) */
.article-toc {
  background: var(--bg-plate-subtle);
  border: 2px solid var(--border-plate);
  clip-path: var(--chamfer-md);
  padding: 24px 28px;
  margin: 32px 0 40px 0;
  box-shadow: var(--plate-shadow);
}

.toc-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--border-plate);
  padding-bottom: 10px;
}

.toc-title {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 900;
  color: var(--text-main);
  letter-spacing: 0.05em;
}

.toc-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 0 !important;
  list-style: none !important;
}

.toc-item {
  font-size: 0.95rem;
}

.toc-link {
  color: var(--text-sub);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-weight: 600;
  transition: all 0.2s ease;
}

.toc-link:hover {
  color: var(--cnc-violet);
  transform: translateX(4px);
}

.toc-num {
  font-family: var(--font-mono);
  color: var(--cnc-violet);
  font-weight: 800;
  font-size: 0.85rem;
}

/* 文章内部对比表格 (Industrial Data Matrix) */
.article-table-wrap {
  overflow-x: auto;
  margin: 28px 0;
  border: 1px solid var(--border-plate);
  clip-path: var(--chamfer-sm);
}

.article-matrix-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.92rem;
  background: var(--bg-plate-elevated);
}

.article-matrix-table th {
  background: var(--bg-plate-subtle);
  font-family: var(--font-mono);
  font-weight: 800;
  color: var(--text-main);
  padding: 14px 16px;
  border-bottom: 2px solid var(--border-plate);
  letter-spacing: 0.02em;
}

.article-matrix-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-plate);
  color: var(--text-sub);
}

.article-matrix-table tr:hover td {
  background: var(--bg-plate-subtle);
}

/* 文章内部突出呼吁卡片 (In-article CTA Box) */
.article-cta-box {
  background: linear-gradient(135deg, var(--bg-plate-subtle) 0%, var(--bg-plate-elevated) 100%);
  border: 2px solid var(--cnc-violet);
  clip-path: var(--chamfer-md);
  padding: 32px 28px;
  margin: 40px 0;
  box-shadow: 0 8px 24px var(--cnc-violet-glow);
  text-align: center;
}

.article-cta-title {
  font-size: 1.35rem;
  font-weight: 900;
  color: var(--text-main);
  margin-bottom: 10px;
}

.article-cta-desc {
  font-size: 0.95rem;
  color: var(--text-sub);
  margin-bottom: 20px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* 文章内部代码配置块 */
.code-spec-block {
  background: var(--cnc-gunmetal);
  color: #E2E4E9;
  border: 1px solid var(--border-sharp);
  clip-path: var(--chamfer-sm);
  padding: 18px 20px;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.6;
  margin: 20px 0;
  overflow-x: auto;
}

/* 文章内部 FAQ 块 */
.article-faq-section {
  margin: 48px 0 40px 0;
  border-top: 2px solid var(--border-plate);
  padding-top: 32px;
}

.article-faq-title {
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--text-main);
  margin-bottom: 20px;
}

/* 相关阅读网格 (Related Articles Grid) */
.related-reading-section {
  margin-top: 48px;
  border-top: 2px solid var(--border-plate);
  padding-top: 36px;
}

.related-section-title {
  font-size: 1.35rem;
  font-weight: 900;
  color: var(--text-main);
  margin-bottom: 20px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.related-card {
  background: var(--bg-plate-subtle);
  border: 1px solid var(--border-plate);
  clip-path: var(--chamfer-sm);
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.2s ease;
}

.related-card:hover {
  border-color: var(--cnc-violet);
  transform: translateY(-3px);
  box-shadow: var(--plate-shadow);
}

.related-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--cnc-violet);
  margin-bottom: 6px;
}

.related-card-title {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.4;
  margin-bottom: 12px;
}

.related-link-text {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--cnc-violet);
}

@media (max-width: 768px) {
  .related-grid {
    grid-template-columns: 1fr;
  }
}